Subaru Legacy 2004 Service Manual page 3358

POWER ASSISTED SYSTEM (POWER STEERING)
2. MEASUREMENT OF STEERING EFFORT
Step
1 CHECK STEERING EFFORT.
1) Stop the vehicle on a concrete road.
2) Start the engine.
3) Run the engine at idle.
4) Install a spring scale on the steering wheel.
5) Pull the spring scale at a right angle to the
steering wheel, and measure both right and left
steering wheel efforts.
NOTE:
When turning the steering more quickly than
necessary from a direction to the other direction
at an engine speed over 2,000 rpm, steering ef-
fort may be heavy. This is caused by flow char-
acteristic of oil pump and is not defective.
2 CHECK STEERING EFFORT.
1) Stop the engine.
2) Pull the spring scale at a right angle to the
steering wheel, and measure both right and left
steering wheel efforts.
3 CHECK STEERING WHEEL EFFORT.
1) Remove the universal joint.
2) Measure steering wheel effort.
4 CHECK STEERING WHEEL EFFORT.
Measure steering wheel effort.
5 CHECK UNIVERSAL JOINT.
Measure the folding torque of the joint (yoke of
steering column side). <Ref. to PS-21,
INSPECTION, Universal Joint.>
6 CHECK UNIVERSAL JOINT.
Measure the folding torque of the joint (yoke of
gearbox side). <Ref. to PS-21, INSPECTION,
Universal Joint.>
7 CHECK FRONT WHEEL.
Check the front wheel.
8 CHECK TIE-ROD ENDS.
Remove the tie-rod ends.
9 CHECK BALL JOINT.
Remove the ball joint.
10 CHECK GEARBOX.
Measure the rotating of gearbox.
<Ref. to PS-44, TURNING RESISTANCE OF
GEARBOX, INSPECTION, Steering Gearbox
[LHD Model].>
11 CHECK GEARBOX.
Measure the sliding of gearbox.
<Ref. to PS-43, SERVICE LIMIT, INSPEC-
TION, Steering Gearbox [LHD Model].>
General Diagnostic Table
Check
Is the steering effort less than
29.4 N (3.0 kgf, 6.6 lb)?
Is the steering effort less than
294.2 N (30 kgf, 66.2 lb)?
Is steering effort less than 2.26
N (0.23 kgf, 0.51 lb)?
Is the difference of steering
effort between clockwise and
counterclockwise less than
20%?
Is the folding torque less than
7.3 N (0.74 kgf, 1.64 lb)?
Is the folding torque less than
3.8 N (0.39 kgf, 0.86 lb)?
If the front wheels have
unsteady revolution or rattling
and brake for dragging?
If the tie-rod ends of suspen-
sion have unsteady revolution
or rattling?
If the ball joints of suspension
have unsteady revolution or
rattling?
Is the rotating resistance of
steering gearbox less than
10.5 N (1.1 kgf, 2.4 lb)? Is the
difference between clockwise
and counterclockwise less than
20%?
Is the sliding resistance of
steering gearbox less than 314
N (32 kgf, 71 lb)? Is the differ-
ence between right and left
sliding resistances less than
20%?
PS-88
Yes
Go to step 2. Adjust the back-
lash.
Go to step 3. Perform adjust-
ment.
Go to step 4. Check, adjust and
replace if neces-
sary.
Go to step 5. Check, adjust and
replace if neces-
sary.
Go to step 6. Replace with a
new one.
Go to step 7. Replace with a
new one.
Inspect, readjust Go to step 8.
and replace if nec-
essary.
Inspect and Go to step 9.
replace if neces-
sary.
Inspect and Go to step 10.
replace if neces-
sary.
Go to step 11. Readjust the back-
lash, and if ineffec-
tive, replace the
faulty parts.
Steering effort is Readjust the back-
normal. lash, and if ineffec-
tive, replace the
faulty parts.
No